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Giant Pacific octopuses are able to recognise individual humans [66] and common octopuses can recognise other octopus individuals for at least one day. [ 67 ] In a study on social learning, common octopuses (observers) were allowed to watch other octopuses (demonstrators) select one of two objects that differed only in colour.
Most octopuses mimic select structures in their field of view rather than becoming a composite color of their full background. [ 41 ] Evidence of original coloration has been detected in cephalopod fossils dating as far back as the Silurian ; these orthoconic individuals bore concentric stripes, which are thought to have served as camouflage ...
An octopus (pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒ k ˈ t ɒ p ə d ə /, ok-TOP-ə-də [3]).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.
Octopus vulgaris grows to 25 cm (10 inches) in mantle length with arms up to 1 m (3.3 feet) long. [3] It lives for 1–2 years and may weigh up to 9 kg (20 pounds). [4] [5] Mating may become cannibalistic. [6] O. vulgaris is caught by bottom trawls on a huge scale off the northwestern coast of Africa. More than 20,000 tonnes (22,000 short tons ...
The octopus saw the divers before the divers saw it because the color-changing animal was perfectly camouflaged to match a pink and yellow rock. The shy but very curious octopus wrapped all eight ...
One of the squid's arms, severed during the attack, was 7.5 meters (25 ft) in length; the full arm was estimated to be 10 meters (33 ft). Based on this, the entire animal could have been much larger. [19] In 1873, a fishing boat in Conception Bay, Newfoundland, was attacked by a giant squid. Numerous letters about the incident stated a severed ...
The Weather Channel shared a video on Wednesday, April 17th of a diver who got a once in a lifetime experience when an octopus grabbed her hand and led her to something that it had found.
The Atlantic pygmy octopus (Octopus joubini), also known as the small-egg Caribbean pygmy octopus, is a small species of octopus in the order Octopoda. Fully grown, this cephalopod reaches a mantle length of 4.5 cm (1.8 inches) with arms up to 9 cm (3.5 inches) long. [ 2 ]